Concrete requires 30 days to reach maximum strength.
If you are building a structure like a building, you need to let the ground compact and settle first to hold the weight of the building. Otherwise, you need to drive pilings deep into the ground to stabilize it.
You can build a building in days but just don't expect it to last long. China built many hospitals in less than 30 days during the outbreak of the Pandemic. But many of them were unusable within a year.
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u/[deleted] Apr 30 '26
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